The procedure of hot mirror welding consists of heating at the same time the two surfaces to weld. We have to reach the plastification temperature, then joint them pressing until the joint's temperature becomes lower.

If the procedure is executed correctly the result are very strongh joints, as much as the original material.

All thermoplastics can be weld following the hot mirror system.

Generally plastification temperatures oscillate between 180 and 280 ºC.

Heating energy has to be applied to surfaces by means of a plack or a hot mirror.

In order to avoid that plastic gets sticked to the hot plack, we can recover it with a teflon layer. In some small dimension applications teflon is not necessary and we use to work at very high temperatures, of about 350 ºC.